ZA803471B - Combined wired broadcasting and viewphone system - Google Patents

Combined wired broadcasting and viewphone system

Info

Publication number
ZA803471B
ZA803471B ZA00803471A ZA803471A ZA803471B ZA 803471 B ZA803471 B ZA 803471B ZA 00803471 A ZA00803471 A ZA 00803471A ZA 803471 A ZA803471 A ZA 803471A ZA 803471 B ZA803471 B ZA 803471B
Authority
ZA
South Africa
Prior art keywords
viewphone
wired broadcasting
combined wired
combined
broadcasting
Prior art date
Application number
ZA00803471A
Other languages
English (en)
Inventor
E Gargini
Original Assignee
Communications Patents Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Communications Patents Ltd filed Critical Communications Patents Ltd
Publication of ZA803471B publication Critical patent/ZA803471B/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
    • H04N7/17345—Control of the passage of the selected programme
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/65—Arrangements characterised by transmission systems for broadcast
    • H04H20/76—Wired systems
    • H04H20/77—Wired systems using carrier waves
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/14—Systems for two-way working
    • H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
    • H04N7/147—Communication arrangements, e.g. identifying the communication as a video-communication, intermediate storage of the signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
  • Small-Scale Networks (AREA)
ZA00803471A 1979-06-19 1980-06-11 Combined wired broadcasting and viewphone system ZA803471B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7921335 1979-06-19

Publications (1)

Publication Number Publication Date
ZA803471B true ZA803471B (en) 1981-06-24

Family

ID=10505949

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00803471A ZA803471B (en) 1979-06-19 1980-06-11 Combined wired broadcasting and viewphone system

Country Status (13)

Country Link
US (1) US4386365A (de)
JP (1) JPS5619243A (de)
AU (1) AU535400B2 (de)
BE (1) BE883882A (de)
CA (1) CA1147449A (de)
CH (1) CH651162A5 (de)
DE (1) DE3022359A1 (de)
ES (1) ES492437A0 (de)
FR (1) FR2459590A1 (de)
IT (1) IT1129012B (de)
NL (1) NL8003541A (de)
SE (1) SE448048B (de)
ZA (1) ZA803471B (de)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5819087A (ja) * 1981-07-24 1983-02-03 Pioneer Electronic Corp Ｃａｔｖシステムにおけるデ−タ
US4645872A (en) * 1982-04-01 1987-02-24 John Hopkins University Videophone network system
FR2543385B1 (fr) * 1983-03-23 1985-07-12 Telecommunications Sa Reseau cable de videocommunication
US4716585A (en) 1985-04-05 1987-12-29 Datapoint Corporation Gain switched audio conferencing network
US4686698A (en) * 1985-04-08 1987-08-11 Datapoint Corporation Workstation for interfacing with a video conferencing network
US4710917A (en) * 1985-04-08 1987-12-01 Datapoint Corporation Video conferencing network
US4893326A (en) * 1987-05-04 1990-01-09 Video Telecom Corp. Video-telephone communications system
US4849811A (en) * 1988-07-06 1989-07-18 Ben Kleinerman Simultaneous audio and video transmission with restricted bandwidth
US5014267A (en) * 1989-04-06 1991-05-07 Datapoint Corporation Video conferencing network
US5343240A (en) * 1991-11-04 1994-08-30 At&T Bell Laboratories Bidirectional video telephony using shared channels on coaxial cable networks
GB2263041B (en) * 1991-12-30 1996-03-20 Nynex Corp System for integrated distribution of switched voice and television on coaxial cable and with video signal transmission originating from subscriber locations
US5329308A (en) * 1992-07-29 1994-07-12 At&T Bell Laboratories Bidirectional video telephony between cable television and switched telephone systems
US5278889A (en) * 1992-07-29 1994-01-11 At&T Bell Laboratories Video telephony dialing
US5675373A (en) * 1994-08-19 1997-10-07 Marion County School Board Interactive television service utilizing both unidirectional and omnidirectional broadcasting
WO2000051350A1 (en) 1999-02-22 2000-08-31 Terk Technologies Corp. Video transmission system and method utilizing phone lines in multiple unit dwellings
DE102013210381B3 (de) * 2013-06-05 2014-05-28 Siemens Aktiengesellschaft Signalübertragung von und zu einer Lokalspule einer Magnetresonanzanlage

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1272594A (en) * 1968-08-09 1972-05-03 Communications Patents Ltd Improvements in and relating to wired broadcasting systems
GB1306367A (de) * 1969-06-06 1973-02-07
US3706996A (en) * 1970-04-14 1972-12-19 Theodore Hafner Frequency adjustment for two-way video transmission
GB1314457A (en) * 1970-11-12 1973-04-26 Communications Patents Ltd Wired broadcasting systems
GB1414127A (en) * 1971-12-03 1975-11-19 Communications Patents Ltd Wired broadcasting systems

Also Published As

Publication number Publication date
JPS5619243A (en) 1981-02-23
CA1147449A (en) 1983-05-31
FR2459590B1 (de) 1984-11-30
AU535400B2 (en) 1984-03-22
US4386365A (en) 1983-05-31
BE883882A (fr) 1980-10-16
SE8004343L (sv) 1980-12-20
FR2459590A1 (fr) 1981-01-09
NL8003541A (nl) 1980-12-23
DE3022359A1 (de) 1981-01-29
CH651162A5 (de) 1985-08-30
IT8048999A0 (it) 1980-06-17
ES8101830A1 (es) 1980-12-16
AU5902380A (en) 1981-01-08
IT1129012B (it) 1986-06-04
SE448048B (sv) 1987-01-12
ES492437A0 (es) 1980-12-16

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